View source for Gossen Metrawatt Metrahit 18S

{{Infobox multimeter
| image           = [[File:Gossen Metrawatt Metrahit 18S small.png|180px]] 
| name            = [[Gossen Metrawatt]] Metrahit 18S
| status          = supported
| source_code_dir = gmc-mh-1x-2x
| counts          = 31000
| categories      = CAT III 1000 V, CAT IV 600 V
| connectivity    = Infrared (RS232)
| measurements    = voltage, current, resistance, capacitance, temperature, diode, continuity
| features        = autorange, data hold, bargraph
| <!-- website         = [http://...] -->
}}

The '''[[Gossen Metrawatt]] Metrahit 18S''' is a 31000 counts handheld digital multimeter with IR (RS232) connectivity.

== Hardware ==

* '''Battery''':  ''9 V IEC 6 F 22'' or ''IEC 6 LR 61'' or corresponding rechargeable battery
* '''Fuse''': 
** Current 300 mA: FF (UR) 1,6 A/500G; 6,3x32 mm
** Current 3A, 10A: 
*** Siba Ultrarapid 16A/600 V≈ 10mm x 38 mm
*** Littlefuse KLK 15A/600 V≈ 13/32” / 1 1/2”
*** Bussmann KLK 15A/600 V≈ 13/32” / 1 1/2”

* TODO.

== Photos ==

<gallery>
File:metrahit_18S_1.jpg|<small>Package</small>
File:metrahit_18S_2.jpg|<small>Inside</small>
File:metrahit_18S_4.jpg|<small>Display</small>
File:metrahit_18S_3.jpg|<small>IR Interface</small>
</gallery>

== Measurement functions and ranges ==

{|border="0" style="font-size: smaller" class="alternategrey sortable sigroktable"
|- 
! Measurement function
! Range
! Resolution
! Accuracy
! sigrok result
! Remarks

|-
| rowspan="5" | V=
| 300 mV
| 10 μV
| ±(0,05% + 3)
| mq V, unit V, mqflags DC
| 

|-
| 3 V
| 100 μV
| rowspan="4" | ±(0,05% + 3)
| "
| 

|-
| 30 V
| 1 mV
| "
| 

|-
| 300 V
| 10 mV
| "
| 

|-
| 1000 V
| 100 mV
| "
| 

|-
| rowspan="5" | V≈
| 300 mV
| 10 µV
| ±(0,5% + 30) (> 500 Digit))
| mq V, unit V, mqflags AC,RMS
|

|-
| 3 V
| 100 μV
| rowspan="4" | ±(0,5% + 30) (> 300 Digit)
| "
| 

|-
| 30 V
| 1 mV
| "
| 

|-
| 300 V
| 10 mV
| "
| 

|-
| 1000 V
| 100 mV
| "
| 

|-
| rowspan="5" | V≃
| 300 mV
| 10 μV
| ±(0,5% + 30) (> 500 Digit))
| mq V, unit V, mqflags AC,DC,RMS
| 

|-
| 3 V
| 100 μV
| rowspan="4" | ±(0,5% + 30) (> 300 Digit)
| "
| 

|-
| 30 V
| 1 mV
| "
| 

|-
| 300 V
| 10 mV
| "
| 

|-
| 1000 V
| 100 mV
| "
| 

|-
| V db≈
| -48 - 63 dB
| 0,01 dB
| 
| mq V, unit V, mqflags AC,RMS
| Actually 5 ranges.

|-
| V db≈ rel
| -48 - 63 dB
| 0,01 dB
| 
| mq V, unit V, mqflags AC,RMS
| Actually 5 ranges. To activate, press yellow button in dB mode, then do second measurement. Cannot be distinguished from non-rel measurement remotely.

|-
| rowspan="6" | A=
| 300.00 µA
| 100 nA
| 
| mq Curr., unit A, mqflags DC	
| 

|-
| 3.0000 mA
| 1 µA
| 
| "
| 

|-
| 30.000 mA
| 1 µA
| 
| "
| 

|-
| 300.00 mA
| 10 µA
| 
| "
| 

|-
| 3.0000 A
| 100 µA
| 
| "
| 

|-
| 10.000 A
| 1 mA
| 
| "
| 

|-
| rowspan="6" | A≃
| 300.00 µA
| 100 nA
| 
| mq Curr., unit A, mqflags AC,DC,RMS	
| 

|-
| 3.0000 mA
| 1 µA
| 
| "
| 

|-
| 30.000 mA
| 1 µA
| 
| "
| 

|-
| 300.00 mA
| 10 µA
| 
| "
| 

|-
| 3.0000 A
| 100 µA
| 
| "
| 

|-
| 10.000 A
| 1 mA
| 
| "
| 
|-
| rowspan="6" | Ω
| 300.00 Ω
| 10 mΩ
| 
| mq Res., unit Ω, mqflags -
|

|-
| 3.0000 kΩ
| 100 mΩ
| 
| "
| 

|-
| 30.000 kΩ
| 1 Ω
| 
| "
| 

|-
| 300.00 kΩ
| 10 Ω
| 
| "
| 

|-
| 3.0000 MΩ
| 100 Ω
| 
| "
| 

|-
| 30.000 MΩ
| 1 kΩ
| 
| "
| 

|-
| Diode/Cont.
| 3.0000 V–
| 1 mV
| 
| mq V, unit V, mqflags DC,DIODE
| Diode and cont. are identical on this device, just without beeper for diode.

|-
| rowspan="8" | Cap. F
| 3.000 nF
| 1 pF
| 
| mq Cap., unit F, mqflags -
|

|-
| 30.00 nF
| 10 pF
| 
| "
| 

|-
| 300.0 nF
| 100 pF
| 
| "
| 

|-
| 3.000 µF
| 1 nF
| 
| "
| 

|-
| 30.00 µF
| 10 nF
| 
| "
| 

|-
| 300.0 µF
| 100 nF
| rowspan="3" | ±(5.0% + 6)
| "
| 

|-
| 3.000 mF
| 1 µF
| "
| 

|-
| 10.00 mF
| 10 µF
| "
| 

|-
| rowspan="4" | Hz≃
| 300.00 Hz
| 0.01 Hz
| rowspan="4" | ±(0.1% + 3)
| mq Freq., unit Hz, mqflags AC,DC
|

|-
| 3.0000 kHz
| 0.1 Hz
| "
| 

|-
| 30.000 kHz
| 1 Hz
| "
| 

|-
| 100.000 kHz
| 10 Hz
| "
| 

|-
| rowspan="4" | °C
| Pt100 –200.0 - +100.0 °C
| rowspan="4" | 0.1 °C
| 2 Kelvin + 5
| mq Temp., unit °C, mqflags -
|

|-
| Pt100 +100.0 - +800.0 °C
| ±(1.0% + 5)
| "
|

|-
| Pt1000 –100.0 - +100.0 °C
| 2 Kelvin + 5
| "
|

|-
| Pt1000 +100.0 - +800.0 °C
| ±(1.0% + 5)
| "
|


|-
| Event count  
| 
|  
| 
| style="background: #FFFF00; "| mq V, unit V, mqflags AC,RMS,REL
|  Counts events >= 2500 digits that last >=2s with a break >=2s. To activate, switch to voltage ACDC, press yellow button twice. Press up to 4 times to cycle parameters, press long to stop. See manual. Not useful remotely because the current measurement value is sent, not the counter.
 
|-
| Stop Watch  
| 
|  
| 
| style="background: #ff0000; "| (Time data)
| To activate, select a 3V-1000V range manually, press yellow button, press AUTO for start/stop, DATA for reset. Delivers only invalid data ("Overflow") via IR on [[User:Matthias Heidbrink | Matthias']] device.
 
|-
| Data Hold  
| 
|  
| 
| style="background: #ff0000; "| mqflags += HOLD
| Disabled while IR interface is active on [[User:Matthias Heidbrink | Matthias']] device.
 
|-
| MIN
| 
|  
| 
| style="background: #ff0000; "| mqflags += MIN
| Influences only display, via IR flag is set, but actual current value is delivered.
 
|-
| MAX
| 
|  
| 
| style="background: #ff0000; "| mqflags += MAX 
| Influences only display, via IR flag is set, but actual current value is delivered. 

|-
|}

The column "sigrok result" contains in short form what the driver generates for the resp. data type.

[[Category:Device]]
[[Category:Multimeter]]
[[Category:Supported]]