3M Static Monitor 790 Podręcznik użytkownika - Strona 12

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6.0 Verification Procedure

This procedure verifies the positive/negative voltage detection levels and ground

monitoring performance of the 3M

Specifications of this user's guide.

Equipment Required – Supplied by User

• DC Power Supply (DCPS) with connecting wires. Output 0 to +10VDC

minimum.

• DC Voltmeter (DCV) with digital display ± 1% accuracy and test leads. Use of

a voltmeter is only required if DCPS does not include a digital display.

• Resistance Substitution Box (RSB), 1Ω to 12Ω (minimum) ±1% or discrete

resistors 8 and 12Ω ±1% value.

Verification Kit 790VK (Ordered Separately)

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• 3M

Dual Conductor Ground Cord 2360 (5 ft.).

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• Two-wire male connector with 24" tinned lead-wires.

• Test wrist band socket.

Procedure:

1. Ground Disconnect / Hi & Lo Audible Alarm Volume Level Functions

Ground Disconnect Specification: 10Ω ±20%

a. Connect the RSB to the two-wire male connector with 24" tinned lead-

wires. Insert the two-wire male connector into the mating jack located at

the rear of the monitor.

b. Connect the AC adaptor supplied with the Static Monitor 790 to the

25VDC input power-jack located at the rear of the monitor and plug the

AC adaptor into a wall outlet.

c. Set the RSB as follows and observe all lamps and audible alarm:

8Ω – Green lamp ON, Red lamps OFF, and audible alarm OFF.

12Ω – Green lamp OFF, Red lamps both ON (Continuous illumination),

and audible alarm ON (Continuous tone).

Note: Confirm Hi and Lo audible alarm volume levels during 12Ω test condition by adjusting

Hi & Lo slide switch located at the rear of the monitor while alarm is sounding.

2. Wrist Strap Function – Open Circuit Test

a. Adjust the RSB connected to the two-wire male connector to 8Ω or less

to silence the Ground Disconnect alarm. The green lamp should be ON at

this time.

Static Monitor 790 as stated in Section 7,

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