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GZ Constant Wrist Strap Monitor Systems
CM-ST010 Single Threshold Constant Wrist Strap Monitor
Item Number
CM-400
Monitor Systems

CM-400 Single Threshold Constant Wrist Strap Monitor

The CM400 monitors ground integrity of one operator/ wrist strap.

Features:

  • Uses audible and visual indicators.
  • Alarm set point: Wrist Strap38 to 87pF (human body); with1 megohm wrist strap resistance

Specifications:

Performance Specifications  
Wrist strap open circuit voltage 0.7 VDC, +0.1VDC @ < 2mA
Mat open circuit voltage 5.0—7.5 VDC
Alarm indicators Visual, audible (green: safe, red: unsafe)

Alarm set point
-Wrist strap

-Mat
38 to 87pF (human body); with
1 megohm wrist strap resistance

6.5 megohm
Unit monitoring capabilities One wrist strap/person
Dimensions/Weight 0.88” H x 1.75” W x 1.25” D
(2.24 x 4.45 x 3.18 cm)
7.4 oz
Mounting Mounting materials included

Power Supply		  
Input 120VAC—60hz
Output 12VDC, 200mA
Audible Alarm 10 beeps (max); 5 seconds
Adjustment No adjustments required

Technical Documents:
» CM-400 Data Sheet
» CM-400 Instruction Manual
CM-ST020 Single Threshold Constant Wrist Strap Monitor
Item Number
CM-410
Wrist Strap Monitor

CM-410 Single Threshold Constant Wrist Strap Monitor

The CM410 is designed to monitor resistance of both the work surface and the operator.

Features:

  • Alarm set point: Wrist Strap: 38 to 87pF (human body); with 1 megohm wrist strap resistance
  • Mat: 6.5 megohm
Performance Specifications  
Wrist strap open circuit voltage 0.7 VDC, +0.1VDC @ < 2mA
Mat open circuit voltage 5.0—7.5 VDC
Alarm indicators Visual, audible (green: safe, red: unsafe)

Alarm set point
-Wrist strap

-Mat
38 to 87pF (human body); with
1 megohm wrist strap resistance

6.5 megohm
Unit monitoring capabilities One wrist strap + mat
Dimensions/Weight 1.00” H x 2.40” W x 2.30” D
(2.54 x 6.10 x 5.84 cm)
7.8 oz
Mounting Mounting materials included

Power Supply		  
Input 120VAC—60hz
Output 12VDC, 200mA
Audible Alarm 10 beeps (max); 5 seconds
Adjustment No adjustments required

Technical Documents:
» CM-400 Data Sheet
» CM-400 Instruction Manual

CM-ST030 Single Threshold Constant Wrist Strap Monitor
Item Number
CM-420
CM-9202 Installation

CM-420 Single Threshold, Dual Operator Constant Wrist Strap Monitor

Monitors the ground integrity of two operators / two wrist straps and work station ground.

Features:

  • Alarm set point: Wrist Strap: 38 to 87pF (human body); with 1 megohm wrist strap resistance
  • Mat: 6.5 megohm
Performance Specifications  
Wrist strap open circuit voltage 0.7 VDC, +0.1VDC @ < 2mA
Mat open circuit voltage 5.0—7.5 VDC
Alarm indicators Visual, audible (green: safe, red: unsafe)

Alarm set point
-Wrist strap

-Mat
38 to 87pF (human body); with
1 megohm wrist strap resistance

6.5 megohm
Unit monitoring capabilities Two wrist straps + mat
Dimensions/Weight 1.00” H x 4.00” W x 2.40” D
(2.54 x 10.16 x 6.10 cm)
12.4 oz
Mounting Mounting materials included

Power Supply		  
Input 120VAC—60hz
Output 12VDC, 200mA
Audible Alarm 10 beeps (max); 5 seconds
Adjustment No adjustments required

Technical Documents:
» CM-400 Data Sheet
» CM-400 Instruction Manual
CM-ST030 Single Threshold Constant Wrist Strap Monitor
Item Number
CM-2015

CM-2015 Dual Wire Continuous Resistance Monitor

The Ohm Metrics CM2015* dual conductor workstation monitor continuously checks two (2) operators and two(2) worksurface ground connections. The unit has a normal voltage of 200mV when wearing a wrist strap and 900mV is the maximum (open wrist strap condition). The CM2015 packaged in a stainless steel case with remote jacks.

Utilizing very precise, low-voltage, resistive loop technology, the CM2015 is an extremely sensitive and Reliable ground monitoring instrument that uses the operator's skin resistance to determine if the system is operating properly. Audible and visible alarms are trig-gered if the operator's resistance exceeds 10 or 35 me-gohm (selectable at factory with default of 35 megohm). Low resistance also triggers an alarm event. Each monitor uses the WB2500 series dual wire wrist strap and coil cord although other compatible wrist strap sets may be substituted. Dual conductor wrist straps enable efficient , accurate resistance monitoring and grounding redundancy.

Features:

  • Monitors the ground integrity of two operators / two dual wire wrist bands and work station mats.
  • Alarm Limits: Wrist strap low limit: 35 megohm
  • Wrist strap high limit: 1.8 megohm
  • Mat high limit: 3.5 megohm
Dimensions:

4” W x 3” D x 1” H
10.16 x 7.62 x 2.54 cm
WEIGHT 6.8 oz
Power Supply 120VAC—60hz, 9-15 Volts DC, 100-600 mA, 2.1mm center positive output
Unit monitoring capabilities 2 wrist straps/persons + 2 mats

Performance Specifications		  
Maximum operator voltage
(alarm condition)		 900mV
Typical operator voltage < 200mV
Maximum mat voltage
(alarm condition)		 1.25V
Typical mat voltage < 900mV
Maximum GND current 100μA
Maximum GND voltage
(alarm condition)		 1mV
Maximum GND voltage
(open circuit condition)		 50mV
   
Alarm Limits  
Wrist strap high limit 35 megohm
Wrist strap low limit 1.8 megohm
Mat high limit 3.5 megohm
GND (tool) high limit 10Ω
Temperature limits Environmental Operating Conditions
50° F (10°C) to 122° F (50°C)
Adjustments No field serviceable components; see periodic verification tools

Technical Documents:
» CM-400 Data Sheet
» CM-400 Instruction Manual
   
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