The following general safety precautions must be observed
during all phases of operation, service and repair of this
instrument. Failure to comply with these precautions or with
specific WARNINGS given elsewhere in this manual violates
the safety standards of the design, manufacture and intended
use of the instrument.
YOKOGAWA assumes no liability for the customer’s failure to
comply with these requirements.
This manual is part of the product and contains important
information. Store this manual in a safe place close to the
instrument so that you can refer to it immediately.
Keep this manual until you dispose of the instrument.
The 2038 instruments are shipped only after stringent inhouse inspection. Should the instrument suffer damage that
is attributable to improper manufacture or an accident during
transport, contact the sales representative from which you
purchased the product or your nearest YOKOGAWA sales
office
All products of YOKOGAWA are guaranteed for a period of one
(1) year from the date of delivery.
YOKOGAWA will repair the product in question, free of charge,
if the product fails during the guarantee period for reasons that
are evidently attributable to YOKOGAWA.
instrument that performs frequency-to-DC current conversion. It does this
by combining a differential transducer with a DC current meter in order to
read frequencies directly. Its indicator uses taut-band suspension, making
it more resistant to vibration and shock and, as a result, far superior to
conventional frequency meters.
1. Do not use the instrument in a location exposed to direct sunlight, an
external magnetic field or mechanical vibration or in a high-te perature
highly humid environment.
2. Place the instrument on a fairly level surface.
A horizontal position will give the highest accuracy.
3. When using a number of these instruments in an array, keep them as far
away from each other as possible.
4. Before wiring any of these instruments, carefully check the measuring
range and polarities. When wiring, securely fasten the terminals.
5. Before measurement, check that the pointer coincides exactly with the
zero scale point. If it does not turn the zero adjust screw provided on
the meter cover until the pointer meets the zero scale point.
Position your eye so that the mirror image of the pointer coincides with
the actual pointer. However, if the pointer is off from the zero scale
point because the pointer is bent, do not adjust using the zero adjust
screw because this will lead to errors.
6. Be careful not to apply an unreasonably large current or high voltage to
the instrument.
7. For the optimum instrument accuracy, select a measuring range such
that the indication may be read in the top half of the scale.
8. Try not to apply too much force when wiping the glass window surface
of the instrument during measurement. Doing so, may result in a
deviation in the indication due to static electricity.
This is especially true when the instrument is used in a dry season.
If the surface is dirty, clean it gently with a dry soft cloth.
— 2 —
IM 2038-01
結線と測定
Fig. 2-1
電源
Power Source
負荷
Load
Fig. 2-2
電源
Power Source
負荷
Load
CONNECTION and MEASUREMENT
(1) あらかじめ電源電圧の概略値を把握し,定格電圧に合った測定
端子を選び結線します。
(2) 120 V 端 子は,50 〜 135 V の範 囲 で, ま た 240 V 端 子は,
130 〜 300 V の範囲で測定可能です。(スケール板に表示)
電源電圧が,300 V を超える場合は計器用変圧器を外付けして
使用します。
(3) 電源電圧を切ったときに,指針が一瞬マイナスに振り切れます
が,計器の異常ではありません。
10 〜 20 秒で指針は零位置に戻ります。
1. Measure the approximate voltage of the power source to be measured,
and then connect the power source to the measuring instrument.
2. The voltage input range of 120 V terminal is 50 to 135 V and the
voltage input range of 240 V terminal is 130 to 300 V.
(The input range is indicated on the scale plate.)
If it is higher than 300 V, connect a voltage transformer.
3. When the power source is cut off, the pointer deflects to the negative
side of the scale. This is not an abnormal phenomenon, but rather an
expected reaction of the instrument's operation.
The deflected pointer returns to the ero position in 10 to 20 seconds.
1. To ensure good measurement, keep the instrument free of dust,
moisture, and away from direct sunlight.
2. If an overload or excessive shock has caused the accuracy of the
instrument to become doubtful, check several scale points and compare
these readings with an instrument which has been properly calibrated.
If the accuracy of the instrument is found to differ from its rating,
recalibrate the instrument.
Ideally, the instrument should be calibrated once or twice every three
months, though this depends on how frequently the instrument is used
and the conditions under which it is operated.
NOTE
If any troubles occur in the instrument, contact your nearest
YOKOGAWA Sales office or sales agent.
— 4 —
IM 2038-01
仕 様
SPECIFICATIONS
精度階級 :次頁(次ページ)参照
定格電圧:120/240 V
120 V: 50 〜 135 V で使用可能
240 V: 130 〜 300 V で使用可能
指針振れ角:約 85°
目盛長:約 135 mm
目盛区分:次頁(次ページ)参照
絶縁試験:電気回路と外箱間 DC 500 V にて 10 MΩ 以上
電圧試験:電気回路と外箱間 2000 VAC, 5 秒間
使用温湿度範囲: 0 〜 40℃,30 〜 75% RH
保存温湿度範囲: − 10 〜+ 50℃,25 〜 80% RH
外形寸法:約 195 × 170 × 87 mm
質量:約 1.8 kg
アクセサリ(別売):携帯用かばん 2291 01
Rated Accuracy:See the table on the next page
Rated Voltage:
120 V for models operated on a source voltage of 50 to 135 V
240 V for models operated on a source voltage of 130 to 300 V
Deflection Angle:Approx. 85°
Scale Length:Approx. 135 mm
Scale Division:See the table on the next page
Insulation Test:More than 10 MΩ at 500 VDC
between the circuit and case
Voltage Test:2000 VAC, for 5 seconds
when measured between the circuit and case
Operating Temperature and Humidity Range:
0 to 40°C, 30 to 75% RH
Storage Temperature and Humidity Range:
-10 to 50°C, 25 to 80% RH
Dimensions:Approx. 195 × 170 × 87 mm
Weight:Approx. 1.8 kg
Optional Accessories: Carrying case model 2291 01
— 5 —
IM 2038-01
<アクセサリ
計器用変圧器:0.2級
Voltage Transformer: 0.2%
* 受注停止製品
* Discontinued product
形名
Model
2038
コード
Code
31
32
2038 03 *
2038 04 *
2038 11 *
2038 12 *
精度階級 Accuracy: % of full scale value
Accessories>
形名
Model
2261
2261 02 *
2261 03 *
2262 00 *
コード
Code
01110 V
測定範囲
Measuring Range
45 – 65 Hz
20 – 100 Hz
100 – 300 Hz
300 – 500 Hz
45 – 55 Hz
55 – 65 Hz
220/440/2200/3300 V
15/30/50/75 V
100/200/300/500 V
3300/6600 V