Martel Electronics EL-USB-4 User Manual

EL-USB-4 4-20mA Current Loop USB Data Logger

This data logger measures and stores up to 32,000 current loop readings over a 4-20mA d.c. measurement range. The user can
easily set up the logging rate and start time, and download the stored data by plugging the module straight into a PC's USB port and
running the purpose designed software under Windows 98, 2000 or XP. The data can then be graphed, printed and exported to
other applications. The data logger is supplied complete with a long-life lithium battery. Correct functioning of the unit is indicated
by a flashing red and green LED. The data logger features a pair of screw terminals and is is supplied complete with a set of
measurement leads terminating in crocodile clips.

FEATURES

• 4-20mA d.c. Current Loop Measurement Range
 Logging Rates between 1s and 12hr
 Stores 32,000 readings
 Connection via two screw terminals
 USB Interface for Set-up and Data Download
 User-Programmable Alarm Thresholds
 Red and Green LED Status Indication
 Replaceable Internal Lithium Battery

WINDOWS CONTROL SOFTWARE

Easy to install and use, the control software runs under
Windows 98, 2000 and XP (Home and Professional
Editions). It allows the user to set up and download any EL­USB-4.

ORDERING INFORMATION

Stock Number
Standard Data Logger EL-USB-4
(Data Logger, Measurement Leads,
Software on CD and Battery)

DATA LOGGER SET-UPS

 Logger Name
 Logging Rate (1s, 10s, 1m, 5m, 30m, 1hr, 6hr, 12hr)
 High and Low Alarms
 Start Date and Start Time

Replacement Battery BAT 3V6

SPECIFICATIONS

Specification Min. Typ. Max. Unit

4-20mA d.c. measurement range 0 4-20 mA d.c.

Internal resolution 0.05 mA d.c.
Accuracy (overall error) 1 % 1 count
Logging rate every 1s every 12hr ­Operating temperature range -35 (-31) +80 (176) °C (°F)
1/2AA 3.6V Lithium Battery Life* 1 Year

* depending on ambient temperature, logging rate and use of alarm LEDs.

LASCAR ELECTRONICS LTD.
MODULE HOUSE
WHITEPARISH
WILTSHIRE SP5 2SJ
UK
TEL: [phone]
FAX: [phone]
E-mail: [e-mail]

Specifications liable to change without prior warning

LASCAR ELECTRONICS INC.
3750 West 26th Street
Erie
PA 16506
USA
TEL: [phone]

PO Box 770, Londonderry, NH 03053 1-800-821-0023

FAX: [phone]
E-mail: [e-mail]

www.martelcorp.com

EL-USB-4 Issue 1 July/2005 M.C. Applies to EL-USB-4/1

+

+ +

LASCAR ELECTRONICS (HK) LIMITED
FLAT C, 5/FL., LUCKY FTY. BLDG.
63-65 HUNG TO ROAD
KWUN TONG KOWLOON
HONG KONG
TEL: [phone]
FAX: [phone]
E-mail: [e-mail]

EL-USB-4 4-20mA Current Loop USB Data Logger

LED FLASHING MODES

EL-USB-4 features a red and a green LED.

The LEDs on an EL-USB-4 will flash in one of the following ways, assuming alarm latching is turned off (exact
timings to be confirmed).

- Green single flash, Logger primed and ready to start.
every 30 seconds

- Green single flash, Logging in progress, last stored value OK
every 10 seconds

- Red single flash, Logging in progress, the last stored reading is equal to or exceeds the low alarm level
every 10 seconds (If latching is turned on, then a stored value is equal to or exceeds the low alarm level)

- Red double flash Logging in progress, the last stored reading is equal to or exceeds the high alarm level
every 10 seconds (If latching is turned on, then a stored value is equal to or exceeds the high alarm level)

- Green single flash, Low battery, logging in progress, the last stored value OK
every 20 seconds

- Red single flash, Low battery, logging in progress, the last stored value is equal to or exceeds the low alarm level
every 20 seconds

- Red double flash, Low battery, logging in progress, the last stored value is equal to or exceeds the high alarm level
every 20 seconds

- Green double flash, Logger is full, last stored value OK
every 20 seconds

- Red/Green single flash, Logger is full, last stored value is equal to or exceeds the low or high alarm level
every 20 seconds,
alarm latching turned on

- No LEDs flash LEDs disabled during configuration to save battery power and increase logging duration.

or

Battery dead.

By default latching is disabled. The red LED will then no longer continue to flash after the logged curent has
returned to normal. Instead, the green LED will then flash.

Latching can be turned on via the control software, so the red LED will continue to flash, even after the logged
current has returned to normal. The red LED will effectively have latched into its alarm condition. This feature
ensures that the user is notified that an alarm level has been exceeded, without the need to download the data
from the logger.

PO Box 770, Londonderry, NH 03053 1-800-821-0023

Specifications liable to change without prior warning

www.martelcorp.com

EL-USB-4 Issue 1 July/2005 M.C. Applies to EL-USB-4/1