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28 II Ex 

Calibration Information 

8

 

Frequency Counter Sensitivity and Trigger Levels 

Input Range 

Minimum Sensitivity (RMS Sine Wave) 

Approximate Trigger Level 

(DC Voltage Function) 

5 Hz – 20 kHz 

0.5 Hz – 200 kHz 

600 mV dc 

70 mV (to 400 Hz) 

70 mV (to 400 Hz) 

40 mV 

600 mV ac 

150 mV 

150 mV 

6 V 

0.3 V 

0.7 V 

1.7 V 

60 V 

3 V 

7 V (

140 kHz) 

4 V 

600 V 

30 V 

70 V (

14.0 kHz) 

40 V 

1000 V 

100 V 

200 V (

1.4 kHz) 

100 V 

Duty Cycle (Vdc and mVdc) 

Range Accuracy 

0.0 % to 99.9 %

 [1]

 

Within 

±

 (0.2 % per kHz + 0.1 %) for rise times <1 

μ

s. 

[1]  0.5 Hz to 200 kHz, pulse width >2 

μ

s. Pulse width range is determined by the frequency by the frequency of the signal. 

Input Characteristics 

Function 

Overload 

Protection 

Input 

Impedance 

(nominal) 

Common Mode  
Rejection Ratio  

(1 k

Ω

 unbalance) 

Normal Mode Rejection 

L

 

1000 V rms 

10 M

Ω

 <100 pF 

> 120 dB at dc, 50 Hz 

or 60 Hz 

> 60 dB at 50 Hz or 60 Hz 

 

1000 V rms 

> 120 dB at dc, 50 Hz 

or 60 Hz 

> 60 dB at 50 Hz or 60 Hz 

K

 

1000 V rms  10 M

Ω

 < 100 pF 

(ac-coupled) 

> 60 dB, dc to 60 Hz 

 

 

 

Open Circuit 
Test Voltage 

Full Scale Voltage 

Typical Short Circuit Current 

 

 

To 6 M

Ω

 

5 M

Ω

 or 

60 nS 

600 

Ω

6 k

Ω

 60 

k

Ω

 600 

k

Ω

 6 

M

Ω

50 M

Ω

Ω

 

1000 V rms 

<7.0 V dc 

<1.7 V dc 

<1.9 V dc  500 

μ

A 100 

μ

A 10 

μ

A 1 

μ

A 0.4 

μ

A 0.2 

μ

A

G

 

1000 V rms 

<7.0 V dc 

2.200 V dc 

1.0 mA typical 

MIN MAX Recording 

Nominal Response 

Accuracy 

100 ms to 80 % 
(dc functions) 

Specified accuracy 

±

12 counts for changes >200 ms in duration 

120 ms to 80 % 
(ac functions) 

Specified accuracy 

±

40 counts for changes >350 ms and inputs >25 % of range 

250 

μ

s (peak)

 [1]

 

Specified accuracy 

±

100 counts for changes >250 

μ

s in duration 

(add 

±

100 counts for readings over 6000 counts)  

(add 

±

100 counts for readings in Low Pass mode) 

 [1]  For 6 V range: 1 ms 

Summary of Contents for 28 II Ex

Page 1: ...his document includes Safety Information page 2 International Electrical Symbols page 4 Specifications page 5 General Maintenance page 9 Fuse Test page 9 Performance Tests page 12 Calibration Adjustme...

Page 2: ...tion exposed metal or if the wear indicator shows Check test lead continuity Do not apply more than the rated voltage between the terminals or between each terminal and earth ground Limit operation to...

Page 3: ...mp or wet environments Keep fingers behind the finger guards on the probes Measure for hazardous voltage without the Low Pass Filter WCaution To prevent possible damage to the Meter or to the equipmen...

Page 4: ...CAT III equipment is designed to protect against transients in equipment in fixed equipment installations such as distribution panels feeders and short branch circuits and lighting systems in large bu...

Page 5: ...ry Type 3 AAA Alkaline batteries NEDA 24A IEC LR03 Approved Batteries Duracell Procell MN2400 LR03 Duracell Plus MN2400 LR03 Varta Max Tech No 4703 Varta Industrial Alcaline No 4003 min operating temp...

Page 6: ...1 Below 10 of range add 12 counts 2 Frequency range 1 kHz to 2 5 kHz 3 Specification increases from 1 to 6 at 440 Hz when filter is used DC Voltage Conductance and Resistance Function Range Resolution...

Page 7: ...rden Voltage Accuracy A dc 600 0 A 0 1 A 100 V A 0 2 4 6000 A 1 A 100 V A 0 2 2 mA dc 60 00 mA 0 01 mA 1 8 mV mA 0 2 4 400 0 mA 1 0 1 mA 1 8 mV mA 0 2 2 A dc 6 000 A 0 001 A 0 03 V A 0 2 4 10 00 A 2 3...

Page 8: ...n Ratio 1 k unbalance Normal Mode Rejection L 1000 V rms 10 M 100 pF 120 dB at dc 50 Hz or 60 Hz 60 dB at 50 Hz or 60 Hz 1000 V rms 120 dB at dc 50 Hz or 60 Hz 60 dB at 50 Hz or 60 Hz K 1000 V rms 10...

Page 9: ...move all test leads 2 Shake out dirt that can be in the terminals 3 Soak a clean swab with mild detergent and water Move the swab around in each terminal Dry each terminal with canned air to push the...

Page 10: ...only three AAA 1 5 volt batteries correctly installed to power the Product See the table on the subsequent page for a list of approved batteries All cells are to be replaced at the same time with sam...

Page 11: ...mended the batteries be removed from the Product for long periods of storage Table 2 Approved Batteries Battery Description Manufacturer Duracell Procell MN2400 LR03 Duracell Duracell Plus MN2400 LR03...

Page 12: ...mA fuse 6 Install the fuse assembly into the fuse compartment 7 Refer to steps 4 through 6 in the How to Replace the Batteries section above to replace the battery door Table 3 Fuse Replacement Descri...

Page 13: ...acy Test To measure the accuracy of the Meter set the Calibrator to the Calibrator output parameters shown in Table 5 Make sure the UUT measurement is between the low and high limit shown in the table...

Page 14: ...7 V 330 3 V 23 1000 V 1000 V dc 998 V 1002 V 24 DC Volts 600 mV 50 mV dc 49 8 mV 50 2 mV 25 600 mV 330 mV dc 329 6 mV 330 4 mV 26 Ohms 600 330 Use 2 wire Comp 329 1 330 9 27 6 k 3 3 k Use 2 wire Comp...

Page 15: ...ccurate measurement the Meter and thermocouple adapter must be at the same temperature After connecting the thermocouple adapter to the Meter allow for reading to stabilize before recording display re...

Page 16: ...e calibration adjustment procedure some adjustment steps are longer to do than others 10 seconds to 15 seconds For some of the steps the Meter gives two beeps when the step is complete Not all steps h...

Page 17: ...e If the calibration adjustment is not completed correctly the Meter will not operate correctly 10 Put the calibrator in standby 11 Do steps 6 through 10 for each calibration step in Table 7 12 After...

Page 18: ...er shows Y CALin the display 2 Push D two times to show in the display 3 Use the eight Meter buttons to type in the current password but do not push D 4 Push C to show _ _ _ _ in the display 5 Use the...

Page 19: ...h from OFF to J See Figure 3 item 2 The Meter shows Y CALin the display 5 Short across keypad button S11 on the PCB See Figure 3 item 3 The Meter will beep 6 Turn the rotary switch one position counte...

Page 20: ...charge for importation costs of repair replacement parts if the product purchased in one country is sent for repair elsewhere If the product is defective contact your nearest Fluke authorized service...

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