Omega Products RD-87-TRH User Manual

Strip Chart Recorders

RD-87-J, $460.

RD-87-MA, $460.

RD-87-TRH, $460.

RD-87 Series

Starts at

$

460

⻬ J Thermocouple,

Temperature,
Temperature/Humidity,
Voltage, Current,
4 to 20 mA Input Models

⻬ LCD Alphanumeric

Display, 16 Characters
2-Line

⻬ 100 mm (4") Strip Chart
⻬ Metric (mm) or Standard

(inch) Charts

⻬ Probes are Field

Interchangeable and
Can be Extended

⻬ Over/Under Alarm

with Relay and Beeper,
Selectable Delay Feature

⻬ Battery Backup for

Up to 48 Hours

⻬ +12 Vdc for Mobile

Applications Compatible

All models shown smaller than actual size.

The OMEGA RD-87 Series strip
chart recorders are offered in
different models to record either
a J Thermocouple, Temperature,
Temperature/Humidity, Voltage,
Current, or a 4 to 20 mA input
signal on a 100 mm (4") wide
strip chart, with a single pen.
The temperature/humidity model
uses two pens. Pens are colored
to maximize chart readability. All
RD-87 models offer a LCD display
and user friendly controls. A full
function alarm feature is provided
on the RD-87 Series. The alarm can
be set to sound an audible signal
when the measured value(s) has
exceeded an upper or lower limit.
Each limit is individually set from the
front panel. A delay time before the
alarm is activated may be set by the
user to prevent nuisance alarms
caused by short-term variations.
Low power normally open relay
contacts are provided to allow
activation of a remote alarm,
phone dialer or annunciation.

S-65

RD-87-TEMP, $460.

Power is supplied through a
120 Vac 50/60 Hz plug-in adapter.
External power may be supplied
from any 12 Vdc source such as
automotive, marine, or other battery.
Battery backup for up to 48 hours is
featured to provide operation during
temporary power loss.

Specifications (General)

Operating Ambient Temperature
Range: 0 to 50°C (32 to 120°F)
Storage Temperature:

-18 to 50°C (0 to 120°F)
Primary Power: 115 Vac, 50/60 Hz
adapter (220 to 240 Vac, 50 Hz optional)
Backup Power: 8 “AA” alkaline
batteries (ordered separately)
Alternative Power: 12 V
vehicle operation
Chart Strip Chart: 6 m x 120 mm

3

(20' x 4

Effective Recording Span:

100 mm (4")
Metric Paper Grid Lines: 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

⁄4"), roll type

Chart Speeds:

Standard Paper Grid Lines: 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
Remote Alarm Type: Normally open,
48 Vac/Vdc, 0.1 A dry contacts
Remote Alarm Connection: 2,
terminal (spade) lugs in battery
compartment area

1

⁄4"

Chart Speed Accuracy: ±1%
Alarm Delay Range: 0, 10, 20, 60,

120 min

The RD-87-J is a precision strip chart
recorder for recording temperature
via a J Type thermocouple connected
with a miniature (SMP) type connector
located in the battery compartment area.
A 6' beaded thermocouple fiberglass
wire probe is supplied with the unit. Other
probes, sold separately, are available
as needed for high temperature or other
application requirements.

Specifications (RD-87-J)

Temperature Accuracy: ±1°C (±2°F)

1

⁄2 cm/hour, 1⁄4"/hour
2 cm/hour, 1"/hour
4 cm/hour, 2"/hour
8 cm/hour, 4"/hour
16 cm/hour, 8"/hour

1

⁄2 cm/min, 1⁄4"/min
1 cm/min,
2 cm/min, 1"/min
4 cm/min, 2"/min

1

⁄2"/min

Display: Alphanumeric LCD,
16 characters 2 line
RS232 Port Connection: RJ11 (4 pin)
connector in battery compartment area

RS232 Port Parameters:

Data transmitted as measured,
4800 baud, 8, N, 1
Mounting: Vertical or horizontal,
free standing or wall mounted
Dimensions: 235 x 184 x 50 mm
(9.25 x 7.25 x 2")

Weight: 1.1 kg (2.5 lb)
Power Consumption: 3.5 W max

Temperature Ranges

°C °F

-40 to 60 -40 to 60

-30 to 20 0 to 250
0 to 50 0 to 150

0 to 100 0 to 100
0 to 500 0 to 500

0 to 1000

The RD-87-TRH is a precision
temperature, relative humidity and
dew point recorder with a digital
display. The RD-87-TRH is menu driven
and all parameters are shown on a
2-line alphanumeric LCD display. A
temperature/humidity probe with 6' cable
(2' coiled) is supplied with the unit to
connect to an RJ14 (6 pin) connector
located in the battery compartment area.

Specifications

Temperature Accuracy: ±1°C (±2°F)
Relative Humidity Accuracy: ±2%

(0 to 95% RH)
Temperature Range: -40 to 60°C
(-40 to 140°F)

Relative Humidity Range: 0 to 100%
Dewpoint: Calculated value
Probe Dimensions: 118 x 14 mm Dia.

(4.6 x 0.55")

(RD-87-TRH)

RD-87-J, $460, shown smaller than actual size.

Chart Ranges

°C °F

-40 to 60 -40 to 60

-30 to 20 50 to 150
0 to 50 0 to 100

S

RD-87-TRH, $460, shown smaller than actual size.

S-66