OHAUS Explorer Balances, Руководство по обслуживанию

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CHAPTER 1 - GETTING STARTED
Ohaus Corporation www.ohaus.com 2 Explorer
®
Series Service Manual
1.3
TOOLS AND TEST EQUIPMENT REQUIRED
x
Common hand tools are sufficient to disassemble the Explorer
®
balances.
x
A PC running Microsoft Windows XP or later.
x
Explorer
®
Software Service Tool, PN 83032124
x
RS232 Cable – Balance to PC PN 80500525
x
Digital voltmeter (DVM) with an input impedance of at least 10 meg-ohms at 1 volt DC.
x
Masses as shown in Table 4-1.
1.4
SPECIFICATIONS
Specifications for the Ohaus Explorer
®
Balances are listed in Table 1-1. When a balance has been
serviced, it must meet the specifications listed in the table. Before servicing the balance, determine
what specifications are not met.
Special Note regarding Approved balances:
The specifications for the approved balances below are only for initial testing. These balances must
be tested according to the requirements of the local Weights and Measures authority. Before
returning the balance to service an approved representative of the local Weights and Measures
authority must certify the balance.
Ambient conditions
x Indoor use only
x Altitude: Up to 2000 m
x Specified Temperature range: 10°C to 30°C
x Humidity: maximum relative humidity 80 % for temperatures up to 31°C, decreasing linearly to
50% relative humidity at 40°C
x Mains supply voltage fluctuations: up to -15% to +10% of the nominal voltage
x Over voltage category II
x Pollution degree: 2
x Operability is assured at ambient temperatures between 5°C and 40°C
TABLE 1-1 SPECIFICATIONS
EX with Draftshield (non-Approved)
Model
EX124 EX224 EX324 EX223 EX423
EX623 EX1103
Capacity (g)
120 220 320 220 420 620 1100
Readability d (g) 0.0001 0.0001 0.0001 0.001 0.001 0.001 0.001
Repeatability (g) (1d)
0.0001 0.0001 0.0001 0.001 0.001 0.001 0.001
Linearity (g) (2d) 0.0002 0.0002 0.0002 0.002 0.002 0.002 0.002
OCL (g) (4.5d)
see Table 4-4 for load
0.00045 0.00045 0.00045
0.0045 0.0045 0.0045 0.0045
Zero Drift (g/°C) 0.0001 0.0001 0.0001 0.001 0.001 0.001 0.001
Span Sensitivity (g/°C) 0.0001 0.0001 0.0001 0.001 0.001 0.001 0.001