View source for RS PRO S2

{{Infobox multimeter
| image           = [[File:RS PRO S2 - 01 - Front.png|180px]]
| name            = RS PRO S2
| status          = in progress
| source_code_dir = appa-dmm
| counts          = 6000
| categories      = CAT III (1000V) / CAT IV (600V)
| connectivity    = Bluetooth LE
| measurements    = voltage, frequency, resistance, continuity, diode, capacitance, current, temperature
| features        = autorange, data hold, min/max, relative, non-contact voltage detection hi/lo, backlight, true-rms, data logging, single value storage, auto-v/loz, VFD, built-in magnetic sticker, µA current range
| website         = [https://www.rsonline-privat.de/Products/ProductDetail/RS-PRO-Digital-Multimeter-1000V-ac-400mA-ac-40M-Bluetooth-Kat-III-Kat-IV-1993847 rsonline-privat.de]
}}

The '''RS PRO S2''' is a 6000 counts, CAT IV (600V) / CAT III (1000V) handheld logging digital multimeter with Bluetooth LE connectivity and long battery duration. It is marketed as a "HVAC Multimeter" (optimized for the needs of heating, ventilation, and air conditioning technicians).

It is based on the [[APPA S Series|APPA S2]], See also: [[APPA Multimeters]].

A sigrok-driver supporting these APPA-based devices ("appa-dmm" in sigrok) has been created and will be included in mainline sigrok once it passes acception (see developement repository [https://github.com/Cymaphore/libsigrok github.com/Cymaphore/libsigrok branch appa-dmm]).

= Hardware =

* '''MCU''': [https://ww1.microchip.com/downloads/en/DeviceDoc/60001465A.pdf Atmel ATSAML22N18A-U]
* '''ADC-ID''': [http://www.hycontek.com/wp-content/uploads/DS-HY12P65-TC.pdf Hycontek HY12P65]
* '''BLE-SoC''': [http://www.amiccom.com.tw/asp_en/product_detail.asp?CATG_ID=15&PRODUCT_ID=84 AMICCOM A8105]
* '''Fuses''':
** '''Current range 400mA''': Amp rating: 0.44A, Voltage rating: 1kV, Interrupting rating: 10kA, Opening: Fast acting, Size: 10mm x 34.9mm
* '''Power supply:''' 2 x IEC LR6 1.5V (works fine with IEC HR6 1.2V)

= Photos and Teardown =

<gallery>
File:RS PRO S2 - 01 - Front.png|<small>Front view</small>
File:RS PRO S2 - 02 - SmuView.png|<small>S2 connected to SmuView visualizing readings from the power grid</small>
File:RS PRO S2 - 03.jpg|<small>Measuring voltage from the power grid</small>
File:RS PRO S2 - 04 - Display-Light.jpg|<small>Display close-up with backlight on</small>
File:RS PRO S2 - 05 - Rear.jpg|<small>Rear view</small>
File:RS PRO S2 - 06 - Magnetic sticker.jpg|<small>Magnetic sticker close up</small>
File:RS PRO S2 - Magnetic sticker.jpg|<small>Magnetic sticker inside view</small>
File:RS PRO S2 - 07.jpg|<small>Protective sleeve removed</small>
File:RS PRO S2 - 08 - Rear.jpg|<small>Rear</small>
File:RS PRO S2 - Teardown - 01.jpg|<small>Teardown 1/12</small>
File:RS PRO S2 - Teardown - 02.jpg|<small>Teardown 2/12</small>
File:RS PRO S2 - Teardown - 03.jpg|<small>Teardown 3/12</small>
File:RS PRO S2 - Teardown - 04.jpg|<small>Teardown 4/12</small>
File:RS PRO S2 - Teardown - 05.jpg|<small>Teardown 5/12</small>
File:RS PRO S2 - Teardown - 06.jpg|<small>Teardown 6/12</small>
File:RS PRO S2 - Teardown - 07.jpg|<small>Teardown 7/12</small>
File:RS PRO S2 - Teardown - 08.jpg|<small>Teardown 8/12</small>
File:RS PRO S2 - Teardown - 09.jpg|<small>Teardown 9/12</small>
File:RS PRO S2 - Teardown - 10.jpg|<small>Teardown 10/12</small>
File:RS PRO S2 - Teardown - 11.jpg|<small>Teardown 11/12</small>
File:RS PRO S2 - Teardown - 12.jpg|<small>Teardown 12/12</small>
</gallery>

= Tests =

Unless noted otherweise, the tests in this section have been performed by [[User:Cymaphore|Cymaphore]] on a RS PRO S2, Firmware v2015 / 808

== Usage of rechargable NiMH batteries ==

The device works acceptable with rechargable batteries. Voltage boundaries are however a bit unsuitablefor NiMH cells, battery cut-off level of 1.14V/cell is to early, even for alkaline cells, this way the full capacity of the cells can not be used.

Battery indication

* FULL: >2.86 V (~ 1.43 V/cell)
* HALF: >2.68 V (~ 1.34 V/cell)
* LOW: >2.46 V (~ >1.23 V/cell)
* WARN: >2.28 V (~1.14 V/cell)
* Forced POWER-OFF: <2.28 V (~ 1.14 V/cell)

== Current consumption ==

Test supply voltage: 2.4 V

=== Details ===

All functions measured, average value over measurements taken.

* Device active: 2.952 mA
* With Bluetooth LE active in standby: 4.211 mA
* With Bluetooth LE in active data acquisition: 7.538 mA
* With display backlight on: 17.251 mA

If the device is in APO or low battery power off mode, it consumes 9µA.

Based on that numbers, with backlight off the device should be able to surpass the battery duration specified in the datasheet by a lot, making long duration logging sessions possible.

= Resources =

* [https://www.rsonline-privat.de/Products/ProductDetail/RS-PRO-Digital-Multimeter-1000V-ac-400mA-ac-40M-Bluetooth-Kat-III-Kat-IV-1993847 RS PRO S2 product page]

[[Category:Device]]
[[Category:Multimeter]]
[[Category:Bluetooth]]
[[Category:In progress]]