3M Static Monitor 790, Руководство пользователя

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6.0 Verification Procedure
This procedure verifies the positive/negative voltage detection levels and ground
monitoring performance of the 3M
™
Static Monitor 790 as stated in Section 7,
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), 1
Ω
to 12
Ω
(minimum) ±1% or discrete
resistors 8 and 12
Ω
±1% value.
3M
™
Verification Kit 790VK (Ordered Separately)
• 3M
™
Dual Conductor Ground Cord 2360 (5 ft.).
• 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: 10
Ω
±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:
8
Ω
– Green lamp ON, Red lamps OFF, and audible alarm OFF.
12
Ω
– 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 12
Ω
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 8
Ω
or less
to silence the Ground Disconnect alarm. The green lamp should be ON at
this time.