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Strip Chart Recorders
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RD-87 Series
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The OMEGA RD-87
Series strip chart recorders are offered in different models to record either
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a J
Thermocouple, Temperature, Temperature/Humidity, Voltage, Current, or a 4 to
20 mA
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input signal on a 100 mm (4”) wide strip
chart, with a single pen. The temperature/humidity
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model uses two pens. Pens are colored to maximize chart
readability. All RD-87 models offer a
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LCD
display and user friendly controls. A full function alarm feature is provided
on the RD-87
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Series.
The alarm can be set to sound an audible signal when the measured value(s)
has
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exceeded an upper or lower limit. Each limit is individually set
from the front panel. A delay time
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before the
alarm is activated may be set by the user to prevent nuisance alarms caused
by
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short-term variations. Low power normally open relay contacts are
provided to allow activation
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of a remote alarm, phone dialer or annunciation.
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Power is supplied through a 120 Vac
50/60 Hz plug-in adapter. External power may be supplied
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from any 12 Vdc
source such as automotive, marine, or other battery. Battery
backup for up to
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48 hours is featured to provide operation during temporary
power loss.
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Specifications (General)
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Operating Ambient Temperature
Range:
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0 to 50๐C (32 to 120๐F)
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Storage Temperature:
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-18 to 50๐C (0 to 120๐F)
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Primary Power:
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115 Vac, 50/60 Hz adapter (220 to
240 Vac, 50 Hz optional)
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Backup Power:
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8 “AA” alkaline batteries (ordered separately)
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Alternative Power:
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12 V vehicle operation
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Chart Strip Chart:
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6m x 120mm (20’ x 4 ¾”), roll type
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Effective Recording Span:
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100 mm (4”)
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Metric Paper Grid Lines:
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Time line every 5 mm with markings every 20 mm; 50 minor and 10
major divisions labeled on a rotating basis, with 100 to 0, 10 to 0, 20
to -30, 50 to 0, 60 to -40
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Standard Paper Grid Lines:
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Time line every 0.25” with markings every 1”; 50
minor and 10 major divisions labeled on a rotating basis with 100 to 0, 60 to
-40, 150 to 50, 250 to 0, 500 to 0
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Remote Alarm Type:
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Normally open, 48 Vac/Vdc, 0.1 A dry
contacts
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Remote Alarm Connections:
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2, ¼” terminal (spade) lugs in battery compartment
area
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Chart Speeds:
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½ cm/hour, ¼”/hour
2 cm/hour, 1”/hour
4 cm/hour, 2”/hour
8 cm/hour, 4”/hour
16 cm/hour, 8”/hour
½ cm/min, ¼”/min
1 cm/min, ½”/min
2 cm/min, 1”/min
4 cm/min, 2”/min
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Chart Speed Accuracy:
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+/-1%
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Alarm Delay Range:
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0, 10, 20, 60, 120 min
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Display:
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Alphanumeric LCD, 16 characters 2 line
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RS232 Port Connection:
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RJ11 (4 pin) connector in battery compartment area
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RS232 Port Parameters:
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Data transmitted as measured, 4800 baud, 8, N, 1
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Mounting:
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Vertical or horizontal, free standing or wall mounted
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Dimensions:
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235 x 184 x 50 mm (9.25 x 7.25 x 2”)
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Weight:
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1.1 kg (2.5 lb)
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Power Consumption:
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3.5 W max
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The
RD-87-TRH is a precision temperature, relative humidity and dew point
recorder with a
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Digital
display. The RD-87-TRH is menu driven and all parameters are shown on a
2-line
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Alphanumeric
LCD display. A temperature/humidity probe with 6’ cable (2’
coiled) is supplied
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With the
unit to connect to an RJ14 (6 pin) connector located in the battery
compartment area.
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Specifications (RD-87-TRH)
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Temperature Accuracy:
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+/-1๐C (+/-2๐F)
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Relative Humidity Accuracy:
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+/-2% (0 to 95% RH)
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Temperature Range:
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-40 to 60๐C (-40 to 140๐F)
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Relative Humidity Range:
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0 to 100%
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Dewpoint:
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Calculated value
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Probe
Dimensions:
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118 x 14
mm Dia. (4.6 x 0.55”)
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Chart Ranges
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๐C
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๐F
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-40 to 60
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-40 to 60
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-30 to 20
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50 to 150
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0 to 50
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0 to 100
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