Omega Products OM-EL-2 Installation Manual

®

An OMEGA Technologies Company

OM-EL-2

PORTABLE DATALOGGER

INSTRUCTION

SHEET

M-3140

OM-EL-2 measures,displays, records and controls temperature,humidity, pH, voltage,current, etc., witha memory for8064 readings anda battery lifeof up
to 3 years**. OM-EL-2 can operate as a 'stand alone' logger or be permanently connected to a system. The OM-EL-2 serial link is addressable and up to 8
loggers can be connected to one serial port. The PC software operates under Windows 3.1 and does not require specialist skill tooperate. Data output is in
text format and can be easily integrated into any popular spreadsheet. Graphical output is possible under OM-EL-WIN. Consult the EasyLog software
manual for furtherdetails.

Battery Powered

Multi-function

Non-volatile Data Storage

°

C

Hand Held or Surface Mounting

Easy to Use

Cold Junction Compensation For
Thermocouple Temperature Sensing

Windows 3.1 Control Software

Model No -OM-EL-WIN

Easy to install and use, the control software will enable the user
to controlone or moreEasyLogs and operatethem as acomplete
system. Supplied on a 3½" disk with a manual and serial link.
OM-EL-WINwill run underWindows95.

Accessories - Cables

Model No -OM-EASYLINK

Extension connector to 'daisy chain' more than one EasyLog.
One extension will beneeded for each extra logger.

* Sensor dependent.
** Battery life dependent on input mode and sample

rate.
E.g. Rate Count,5 secsample rate.
Battery lifeis approximately30days.

Hand Held Data Logger OM-EL-2

Specification Range Resolution Accuracy

Temperature ('K' type thermocouple)

Temperature (internal)

Humidity 5 to 95% RH 1%RH *
pH 0 to 14pH 0.1pH* ±0.1pH*

Voltage

Current 0 to 2A 0.01A ±1%
Rate count 0 to 255 1 unit N/A
Frequency 40 to 400Hz N/A ±2Hz
Battery 3.6V ½AA lithium (up to 3 years life)**
Serial link 8 Pin Mini DIN
Sensor connection Phono
Memory capacity up to 8000 readings
Logging rate 1 sample per 5 seconds to 1 per 12 hours.

-25 to +200°C 1°C ±1°C

-13 to +392°F 1°F ±2°F

-10 to +50°C 1°C ±1°C

+14 to +122°F 1°F ±2°F

0 to 2V D.C. 0.01V

0 to 20V D.C. 0.1V

Model No

±1%

DIMENSIONS All dimensions in mm (inches)

70.0 (2.75)

46.5 (1.83)

17.5 (0.69)

54.0 (2.12)

15.0 (0.59)

26.0 (1.02)

54.0 (2.12)

8.00

(0.31)

26.0 (1.02)

37.5 (1.47)

Screws M3 x 16

2.50

(0.09)

4.50

(0.17)

+

60.0 (2.36)

65.5 (2.58)

LITHIUM
BATTERY

LK1

LK2

USING EXTERNAL SIGNALS

PIN FUNCTION

A1, A2, REF Output for test diagnostics. Do notuse.
HA High Alarm output =V+ whenalarmed.
SW 'Pushto record event' input. Active low- operatedby frontswitch,subjectto Push-to-Start.
RS Reset input. Active low -operated byRESET switch. NOTE -loggingwillstopand restart at 0 time.
LA Low Alarm output =V+ whenalarmed.
A+ Output= V+ when a reading isin progress.
V+ Batterypositive.
V- Battery negative.

Only connect outputs to high impedance inputs, otherwise performance will be affected and battery life drastically reduced.

DO NOT APPLYAN EXTERNAL SUPPLYVOLTAGE
ACROSS THESE PINS WITH BATTERY IN PLACE.

3.50

(0.13)

44.0 ((1.73)

-

RESET

A+LAV+

A1

RS

A2

REFHAV-

SW

LK3

BATTERY REPLACEMENT

Only use ½AA 3.6V lithium. The list belowis not exhaustive. Check with supplierthat thebattery you areorderingis 'press fit'and isnot fitted withsolder
tags or leads. Take care to connect correctly.

MANUFACTURER PARTNUMBER MANUFACTURER'SORDER CODE

MAXELL ER 3S TC n/a

SAFT LS3 n/a

SONNENSCHEIN SL-750/S 1107 501 100

TADIRAN ½AA/S 1551-02-210-000

WARNING: Handle lithiumbatteries carefully-observe warnings on battery casing. Dispose ofin accordancewithlocal regulations.

VARIOUS OPERATING MODES

Pluggable Links (Links1&3)

SHORTED

OPEN

On-Board Link (Link 2)

Normally
SHORT
Cut to OPEN

Normally
OPEN
Solder to
SHORT

RED

YELLOW

“K" type thermocouple

TEMPERATURE (with thermocouple)

A 'K' type thermocouple can be connected
directly tothe OM-EL-2. The range should
be selected in the OM-EL-WIN software.
Ensure Link 3is OPEN.

TEMPERATURE (internal)

No plug needed. The OM-EL-2
uses its internal temperature

sensor. EnsureLink3 is SHORTED.
Alternatively use a phono plug which has
been short circuited.

SENSOR

HUMIDITY

A capacitive humidity sensor can be
connected directly to the EasyLog.

NOTES

1. There is no RH annunciator on the LCD.

2. Sensor range - 200 to 300 pF

3. Sensitivity - 0.5 to 1.0pF per %RH

4. Check Link 3 is open, Link 2 is shorted.

(+VE)

0-20V D.C.

(-VE)

VOLTAGE*

D.C. voltage within the ranges of 0-2V or
0-20V can be connected directly to the
OM-EL-2. Ensure that the appropriate
range hasbeen selected in advance within
the OM-EL-WIN software. For higher
voltage measurement an external
potential divider network should be
added.

NOTES

1. Check Link3 isopen, Link 2is shorted.

+

6watt

1

Ω

0-2A D.C.

0V

(+VE)

(-VE)

CURRENT*

D.C. current can be measured up to 2A
maximum by using an external 1 6watt

Ω

shunt across the input. Select the voltage
'0-2V range' in OM-EL-WIN software and
'A' in thedisplay symbols.

NOTE

1. Check Link 3 is open, Link 2 is shorted.

(+VE)

pH PROBE

(-VE)

pH (with internal reference)

Connect a pH probe that has an internal
reference cell directly to the OM-EL-2 (refer
to the probe'sinstructionmanual).
NOTE - There is no need to open Link 2 if
the SENTEK P14probe isused.

NOTES

1. Open Link 2.

+

(+VE)

(-VE)

0-5V

0

RATE COUNT*

OM-EL-2 counts the number of pulses on the
input during thesample interval (e.g.: every 5s,
10s, 20s etc.). At the end of each sample interval,
the count number is stored and the counter is
reset to zero. A pulsed input of 0-5V can be
directly connected totheOM-EL-2. Thecounter
is incremented onthe fallingedge.

NOTE

1. Check Link 3 is open, Link 2 is shorted.

OMEGAnet On-Line Service

http://www.omega.com

USA:

ISO 9001 Certified

Canada:

For immediate technical or application assistance:

USA and Canada:

Mexico and
Latin America:

Benelux:

Czech Republic:

France:

Germany/Austria:

United Kingdom:

ISO 9002 Certified

*NOTES

1. When using the serial link, ensure that all signals are isolated from the computer ground.

2. When using several loggers together, ensure that all signals are isolated or use the same ground.

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